Voltage spec for 3-phase VFD drive and motor

[Alex]

Perhaps a very basic question;I am confused by the following specification of three-phase voltage levels.
I am to specify VFD drives for a motor application.

The motor is specified as 400/690 V three phase.
The VFD drive I am considering is from the Schneider Electric Altivar process ATV600 line, which can be specified for a voltage rating of 200...240 V, 380...480 V, 380...440 V or 500...690 V.
The plug available at the facility is a CEE type, red in colour.

I am unsure what is the correct spec for the VFD drive and whether the components are compatible with the available supply?


Alex

[GerryR]

Two things to consider:

1) Voltage AND HP of the motor

2) Available Power to the drive, whether 1 ph, 3 ph and the voltage available.

Drives come with the option of 1 ph or 3 ph inputs (the drive does the conversion to 3 ph for the output).  The drives that work from a 1 ph input need to be derated for the motor output because of the way the 3 ph is internally generated for the motor.  Most drives are set to be hard-wired to a panel with appropriate breakers / fuses and disconnect switch.  You can make them pluggable, but you still need to provide the fuses on the input and a disconnect switch.

What are the specs of the motor you are driving?  Read the nameplate data on the motor and we can better help with specing the drive.   

[Alex]

Motor spec is 400delta/690Y, power is 4kW (5.5 HP).
Potential drive is this one, which has a nominal power rating of 4kW. This is rated for a voltage of 380-480VAC three phase. However there is a version rated for 200-240 VAC three phase, otherwise identical.

I am not certain as to what voltage is available, however the socket is red, which I understand indicates 300–480 VAC split phase power. See attached picture of socket. I could measure L-L and L-N if needed.

Does this help?

 

[GerryR]

It looks like the drives are specified for the same input and output voltages.  The drives are also specified for Y connection.  I would contact Schneider to see if 480 delta is ok.  Also I would go to the next size drive (ATV630U55N4, 5.5 kW, 7.5 HP, if you expect the motor to be heavily loaded.  From all that I have read, the 480 unit is what you need for the 480 motor ( the 240 V drives would be for 240 V motors).  You need to be sure what your supply voltage is, so I would measure it.

Here is a selection chart I found on their website.
https://download.schneider-electric.com/files?p_enDocType=User+guide&p_File_Name=ATV600_Getting_started_Annex_EAV64300_11.pdf&p_Doc_Ref=EAV64300

Hope this helps.

[cs.dk]

Motor spec is 400delta/690Y, power is 4kW (5.5 HP).
Potential drive is this one], which has a nominal power rating of 4kW. This is rated for a voltage of 380-480VAC three phase. However there is a version rated for 200-240 VAC three phase, otherwise identical.

I am not certain as to what voltage is available, however the socket is red, which I understand indicates 300–480 VAC split phase power. See attached picture of socket. I could measure L-L and L-N if needed.

Does this help?

Between L-L you would have 400VAC, and 240 VAC between any hot and neutral. 3x240VAC is not common in europe afaik. It's only in Norway that thing exists.

[Al3579]

Your Motor can be wired for 3 phase delta ore 3 phase wye. There is usually a plate over the motor that you can rearrange the windings with a screwdriver.
Now incoming 3 phase power can be 3phase wye or delta. 3 phase delta has 3 legs with each having same potential across them and so does 3phase wye.
Wye has a fourth wire the difference between the center tap & phase vs phase & phase is the
 the square root of 3.

Now with the vfd you got to actually measure mains supply to find a vfd that is compatible.

[Alex]

All is in order now.
Facility supply available at outlet is 3P + N + PE, 415 VAC measured line-line.
I went with the 380-480 VAC VFD, specified as line-line voltage. I went for 5.5kW as suggested.
The VFD manufacturer confirmed operation with said motor, which is 400V delta or 690V Y.

Thanks for the help